The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 2000
Filed:
Mar. 03, 1998
Franz-Rudolf Hell, Lebach, DE;
Abstract
A proportional power control valve includes a solenoid controlling a main piston. The main piston is in fluid communication, through a feed opening, with the valve intake, and cooperates with a servo-control piston to block the valve intake from the valve outlet. The servo-control piston is part of a cylindrical armature controllable by an electromagnet of the solenoid, and can be moved counter to the bias of a locking spring. The locking spring is guided in a receiving chamber in the cylindrical armature. Since the receiving chamber of the cylindrical armature is in continuous fluid communication with the valve intake through a connection formed in the armature by an attenuation opening, the resulting proportional power control valve allows the continuous adjustment of the volume flow of a pressure medium or pressurized fluid dependent upon the level of electric control current supplied to the electromagnet.